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Alva Vincent Campbell
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Individual
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Individual
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Publication of GB190105319ApublicationCriticalpatent/GB190105319A/en
5319. Campbell, A. V. March 13. Pulleys, axle, frame, and like.- One or more loose pulleys C are mounted o n a spindle H, screwed at one end and slotted at the other, which is passed through the window frame. The mortices for the pulleys may be fitted w i t h linings b.
GB190105319D1901-03-131901-03-13Improvements in Sash-pulleys
ExpiredGB190105319A
(en)